“The Transportation Security Administration (TSA) is aware of and monitoring reports of potentially suspicious items onboard cargo flights that landed safely at Newark Liberty and Philadelphia International airports,” the agency said in a statement. “Out of an abundance of caution the planes were moved to a remote location where they are being met by law enforcement officials and swept.”

Update: Contrary to earlier reports, the UPS truck was, apparently, in Brooklyn. Both Brooklyn and Newark Airport have since been declared all clear. According to the Wall Street Journal, no explosives were found during initial tests of the packages (which can be linked to Yemen), but, in conjunction with an uptick in chatter about a potential terror attack in the works, authorities may be speculating whether the devices were planted to test security systems.